Alert archive / Arizona / Severe Thunderstorm Warnings in 2011
Severe Thunderstorm Warning 13, NWS Tucson, AZ
NWS Tucson, AZ issued this severe thunderstorm warning at Jul 4, 2011, 4:48 PM MST for Pima County, Arizona. It was in force for 57 min. 5 reports came from inside the area while it was in force.
The area
The outline as issued, with what was reported inside it.
The facts
- Issued
- Jul 4, 2011, 4:48 PM MST (23:48 UTC)
- Expired
- Jul 4, 2011, 5:45 PM MST
- In force
- 57 min
- Issued by
- NWS Tucson, AZ
- Area
- Storm-based polygon
County Pima County, AZ
The radar
The Tucson radar (KEMX), 55 km from the middle of the area, began a volume at 23:47 UTC, the scan nearest the moment this went out.
Open the radar archive at this moment
The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Jul 4, 5:00 PM MST | TSTM WND DMG | 3 Nnw Saguaro National, AZ | TREE BLOWN DOWN ALONG WITH FLAT ROOF BLOWN OFF |
| Jul 4, 5:10 PM MST | TSTM WND DMG | Oro Valley, AZ | LOCAL TV NEWS MEDIA REPORTED DOWNED POWER LINES AT ORACLE AND HARDY. |
| Jul 4, 5:15 PM MST | TSTM WND DMG | 2 Nne Vail, AZ | 2 TREES BLOWN DOWN. TIME ESTIMATED OFF RADAR |
| Jul 4, 5:15 PM MST | TSTM WND DMG | Tucson, AZ | POWER LINES DOWN PARK AND BROADWAY REPORTED BY LOCAL TV WEATHERCASTER |
| Jul 4, 5:20 PM MST | TSTM WND DMG | 4 Sw South Tucson, AZ | ROOF BLOWN OFF A MANUFACTURED HOME...100 YRDS NW FROM THE SPOTTERS HOME. |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The nearest sounding before it
Tuscon, AZ (KTUS), launched 12:00Z, 11.8 hours before the alert went out and 25 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.
- Mixed-layer CAPE
- 1243 J/kg
- Mixed-layer CIN
- -18 J/kg
- Mixed-layer LCL
- 890 m above ground
- 0-6 km bulk shear
- 28 kt
- 0-1 km storm-relative helicity
- 28 m²/s²
- 0-3 km storm-relative helicity
- 152 m²/s²
- Significant tornado parameter
- 0.6
- Supercell composite
- 3.6
The text
As transmitted, in the capitals the NWS used until 2016.
538 WUUS55 KTWC 042348 SVRTWC AZC019-050045- /O.NEW.KTWC.SV.W.0013.110704T2348Z-110705T0045Z/ BULLETIN - EAS ACTIVATION REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE TUCSON AZ 448 PM MST MON JUL 4 2011 THE NATIONAL WEATHER SERVICE IN TUCSON HAS REISSUED A * SEVERE THUNDERSTORM WARNING FOR... EAST CENTRAL PIMA COUNTY IN SOUTH CENTRAL ARIZONA... THIS INCLUDES THE CITIES OF...TUCSON...ORO VALLEY...MARANA... * UNTIL 545 PM MST * AT 442 PM MST...TRAINED WEATHER SPOTTERS REPORTED A SEVERE THUNDERSTORM CAPABLE OF PRODUCING DAMAGING WINDS IN EXCESS OF 60 MPH. THIS STORM WAS LOCATED OVER THE CENTER OF THE CITY TUCSON...AND MOVING WEST AT 15 MPH. * OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO THREE POINTS AND AVRA VALLEY PRECAUTIONARY/PREPAREDNESS ACTIONS... SEEK SHELTER INDOORS. EXPECT DAMAGING WINDS IN EXCESS OF 60 MPH... LARGE HAIL...FREQUENT LIGHTNING...AND HEAVY RAIN WITH THIS STORM. && LAT...LON 3189 11144 3249 11161 3243 11071 3184 11058 TIME...MOT...LOC 2347Z 101DEG 11KT 3218 11096 $$
2 follow-up statements
777 WWUS55 KTWC 050025 SVSTWC SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE TUCSON AZ 525 PM MST MON JUL 4 2011 AZC019-050045- /O.CON.KTWC.SV.W.0013.000000T0000Z-110705T0045Z/ PIMA AZ- 525 PM MST MON JUL 4 2011 ...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 545 PM MST FOR EAST CENTRAL PIMA COUNTY... AT 518 PM MST...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO INDICATE A SEVERE THUNDERSTORM CAPABLE OF PRODUCING DAMAGING WINDS IN EXCESS OF 60 MPH. THE STORMS EXTEND FROM NEAR ORO VALLEY THROUGH WESTERN PORTIONS OF TUCSON TOWARD THREE POINTS AND THE STORMS ARE MOVING WEST AT 15 MPH. PRECAUTIONARY/PREPAREDNESS ACTIONS... SEEK SHELTER INDOORS. EXPECT DAMAGING WINDS IN EXCESS OF 60 MPH... LARGE HAIL...FREQUENT LIGHTNING...AND HEAVY RAIN WITH THIS STORM. && LAT...LON 3189 11144 3249 11161 3243 11071 3184 11058 TIME...MOT...LOC 0023Z 101DEG 11KT 3220 11109 $$
465 WWUS55 KTWC 050049 SVSTWC SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE TUCSON AZ 549 PM MST MON JUL 4 2011 AZC019-050056- /O.EXP.KTWC.SV.W.0013.000000T0000Z-110705T0045Z/ PIMA AZ- 549 PM MST MON JUL 4 2011 ...THE SEVERE THUNDERSTORM WARNING FOR EAST CENTRAL PIMA COUNTY HAS EXPIRED... NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED THAT A CLUSTER OF THUNDERSTORMS THAT PRODUCED SEVERE WEATHER OVER THE TUCSON METRO AREA EARLIER THIS AFTERNOON HAS MOVED WEST TOWARD THE TOHONO O'ODHAM NATION TOWARD THE TOWNS OF SILVER BELL...QUEENS WELL AND THREE POINTS. THE STORMS HAVE DECREASED IN INTENSITY DURING THE PAST HALF HOUR OR SO. THEREFORE...THE SEVERE THUNDERSTORM WARNING WAS ALLOWED TO EXPIRE AT 545 PM MST. THE STORMS WILL CONTINUE TO MOVE THROUGH THE TOHONO O'ODHAM NATION AND WILL PRODUCE PERIODS OF HEAVY RAIN AND STRONG GUSTY WINDS OF 35 TO 45 MPH. LAT...LON 3189 11144 3249 11161 3243 11071 3184 11058 TIME...MOT...LOC 0025Z 101DEG 11KT 3220 11110 $$
The office that day
Everything else NWS Tucson, AZ issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 3, 10:27 PM MST | Areal Flood Advisory | TWC | Pima | 68 min |
| Jul 4, 5:53 AM MST | Areal Flood Advisory | TWC | Pima, Pinal | 112 min |
| Jul 4, 11:58 AM MST | Severe Thunderstorm Warning | TWC | Pima | 47 min |
| Jul 4, 12:54 PM MST | Severe Thunderstorm Warning | TWC | Santa Cruz | 51 min |
| Jul 4, 1:17 PM MST | Flash Flood Warning | TWC | Santa Cruz | 58 min |
| Jul 4, 1:38 PM MST | Areal Flood Advisory | TWC | Cochise | 112 min |
| Jul 4, 2:46 PM MST | Severe Thunderstorm Warning | TWC | Cochise, Pima | 44 min |
| Jul 4, 3:39 PM MST | Areal Flood Advisory | TWC | Pima | 55 min |
| Jul 4, 4:03 PM MST | Severe Thunderstorm Warning | TWC | Pima | 42 min |
| Jul 4, 4:15 PM MST | Severe Thunderstorm Warning | TWC | Pima | 39 min |
| Jul 4, 4:31 PM MST | Flash Flood Warning | TWC | Pima | 89 min |
| Jul 4, 4:44 PM MST | Dust Storm Warning | TWC | Pima, Pinal | 6 min |
| Jul 4, 4:50 PM MST | Dust Storm Warning | TWC | Pima, Pinal | 70 min |
Nearby
Severe Thunderstorm Warnings in Arizona, 2011Every severe thunderstorm warning in 2011
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.